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Marrrta [24]
3 years ago
5

In most cases, letters of reconmendation are required for addmission to?

Physics
1 answer:
kykrilka [37]3 years ago
8 0

Answer:

Get your recommenders to mention diverse achievements. ...

Help your recommenders with relevant info. ...

The letter should always include examples of things you did. ...

The letter should show how you improved over time. ...

The tone of the letter should not be too dry.

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Plzzzzzzz help me quick
andrezito [222]

Explanation:

in the first thing we are allowing bacteria to grow

in the second one we are killing it

3 0
3 years ago
Calculate the energy in electron volts of X-rays that have a frequency of 3.00 x 100 Hz.
inn [45]

Answer:

E = 124 eV

Explanation:

Given,

The frequency of the X-rays, ν = 3.0 x 10¹⁰ Hz

The formula for calculating the energy of the electromagnetic waves of a single photon of having frequency 'ν' is given by the relation

                                    E = hν      joules

Where,

                       h - Planck's constant (6.626 x 10⁻³⁴  Js)

Substituting the values in the above equation

                                    E = 6.626 x 10⁻³⁴  Js   x  3.0 x 10¹⁰ Hz

                                       = 1.9878 x 10⁻²³  J

Converting it into eV

                                    E = 1.9878 x 10⁻²³  x 6.242 x 10¹⁸    eV

                                       = 124 eV

Therefore, the energy in electron volts of X-rays is, E = 124 eV

8 0
3 years ago
A leaky 10-kg bucket is lifted from the ground to a height of 10 m at a constant speed with a rope that weighs 0.9 kg/m. Initial
sladkih [1.3K]

Answer:

The work done shall be 14715 Joules

Explanation:

The work done by a force 'F' in a displacement 'dy' is given by

W=m(y)g\times dy

At any position 'y' the weight shall be sum of weft of water and weight of string

\therefore m(y)=m_{water}(y)+m_{string}(y)\\\\m(y)=30(1-\frac{y}{10})+0.9y

Thus applying values we get

W=\int m(y)g\times dy\\\\W=\int_{0}^{10}(30(1-\frac{y}{10}+0.9y)\times g)dy\\\\Solving\\W=294.3\int_{0}^{10}(1-\frac{y}{10}+0.9y)dy\\\\W=14715J

8 0
3 years ago
Which of the following objects is exerting a gravitational force on the floating tool? the Earth, the Moon, the astronaut, the S
Tcecarenko [31]
All of them are correct.
4 0
3 years ago
Read 2 more answers
What’s the difference between the resistance of 1,000 feet of aluminum No. 14 wire and 1,000 feet of No. 14 copper wire? A. The
Lapatulllka [165]

the answer is A. The aluminum has 0.84 ohms more resistance.

3 0
3 years ago
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